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Article
Report number	arXiv:2404.06046
Title	Nuclear charge radii of germanium isotopes around $N$ = 40
Related title	Nuclear charge radii of germanium isotopes around N = 40
Author(s)	Wang, S.J. (Peking U., SKLNPT) ; Kanellakopoulos, A. (Leuven U.) ; Yang, X.F. (Peking U., SKLNPT ; Leuven U.) ; Bai, S.W. (Peking U., SKLNPT) ; Billowes, J. (Manchester U.) ; Bissell, M.L. (Manchester U.) ; Blaum, K. (Heidelberg, Max Planck Inst.) ; Cheal, B. (Manchester U.) ; Devlin, C.S. (Manchester U.) ; Garcia Ruiz, R.F. (MIT ; CERN) ; Han, J.Z. (Tsinghua U., Beijing) ; Heylen, H. (CERN) ; Kaufmann, S. (Darmstadt, Tech. U. ; Mainz U.) ; Konig, K. (Darmstadt, Tech. U.) ; Koszorus, A. (Leuven U.) ; Lechner, S. (CERN ; TU Vienna) ; Malbrunot-Ettenauer, S. (CERN ; TRIUMF) ; Nazarewicz, W. (Michigan State U.) ; Neugart, R. (Heidelberg, Max Planck Inst. ; Mainz U.) ; Neyens, G. (Leuven U. ; CERN) ; Nortershauser, W. (Darmstadt, Tech. U.) ; Ratajczyk, T. (Darmstadt, Tech. U.) ; Reinhard, P.-G. (U. Erlangen-Nuremberg (main)) ; Rodrıguez, L.V. (Heidelberg, Max Planck Inst. ; CERN) ; Sels, S. (Leuven U. ; CERN) ; Xie, L. (Manchester U.) ; Xu, Z.Y. (Leuven U. ; Tennessee U.) ; Yordanov, D.T. (IJCLab, Orsay) ; Yu, Y.M. (Beijing, KITPC ; Beijing, GUCAS)
Publication	2024-07-11
Imprint	2024-04-09
Number of pages	6
Note	6 pages,5 figures
In:	Phys. Lett. B 856 (2024) pp.138867
DOI	10.1016/j.physletb.2024.138867 (publication) 10.1016/j.physletb.2024.139073 (erratum)
Subject category	nucl-th ; Nuclear Physics - Theory ; nucl-ex ; Nuclear Physics - Experiment
Abstract	Collinear laser spectroscopy measurements were performed on $^{68-74}$Ge isotopes ($Z = 32$) at ISOLDE-CERN, by probing the $4s^2 4p^2 \, ^3\!P_1 \rightarrow 4s^2 4p 5s \, ^3\!P_1^o$ atomic transition (269 nm) of germanium. Nuclear charge radii are determined via the measured isotope shifts, revealing a larger local variation than the neighboring isotopic chains. Nuclear density functional theory with the Fayans functionals Fy($\Delta r$,HFB) and Fy(IVP), and the SV-min Skyrme describes the experimental data for the differential charge radii $\delta\langle r^{2} \rangle$ and charge radii $R_{\rm c}$ within the theoretical uncertainties. The observed large variation in the charge radii of germanium isotopes is better accounted for by theoretical models incorporating ground state quadrupole correlations. This suggests that the polarization effects due to pairing and deformation contribute to the observed large odd-even staggering in the charge radii of the Ge isotopic chain.
Copyright/License	publication: © 2024 The Author(s) (License: CC BY 4.0), sponsored by SCOAP³ preprint: (License: CC BY 4.0)

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